class AddUsersStyleColumn < ActiveRecord::Migration[6.0]
  def change
    # 添加字段 :针对 users 表, :字段名, :字段类型 
    add_column :users, :style, :string
    change_column :table_name, :column_name, :column_type, :column_options
    #Ex:- change_column("admin_users", "email", :string, :limit =>25)
  end
end
